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No exploitation reportedFix available

CVE-2021-32743

No exploitation reported by the sources we read.

  • Published2021-07-15
  • Fixed in2.12.5 · 2.11.10
  • WeaknessCWE-202

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Timeline

dates in UTC
  1. 2021-07-1516:15CVE publishedNVD

Versions per branch

NVD
Icinga
BranchAffectedFixed in
2.12≥ 2.12.0, < 2.12.52.12.5
2.x≥ 2.0.0, < 2.11.102.11.10
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • icinga2Ubuntu:26.10all versions · no fixed version listed
  • icinga2Ubuntu:26.04:LTSall versions · no fixed version listed
  • icinga2Ubuntu:25.10all versions · no fixed version listed
  • icinga2Ubuntu:24.04:LTSall versions · no fixed version listed
  • icinga2Ubuntu:22.04:LTSall versions · no fixed version listed
  • icinga2Ubuntu:20.04:LTSall versions · no fixed version listed
  • icinga2Ubuntu:18.04:LTSall versions · no fixed version listed
  • icinga2Ubuntu:16.04:LTSall versions · no fixed version listed

11 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Icinga to 2.12.5 · 2.11.10

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.18.8known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • NVDCVSS 2.06.5read 2026-10-23
  • CNAweakness (CWE)CWE-202known since 2026-10-23
  • FIRST EPSSEPSS score1.8 %2026-11-08
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-07-15
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-32743?

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Is CVE-2021-32743 actively exploited?

Active exploitation of CVE-2021-32743 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-32743?

CVE-2021-32743 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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